Forget everything you know about abdominal exercises: you don't have to perform endless stomach crunches on the floor for that six pack. This standing abs routine strengthens your entire core and works your cardiovascular fitness, too.

Release tension in your limbs with this seated yoga routine, which you can do throughout the day, including at work at your desk. Perform each move slowly and smoothly, and breathe deeply and regularly.

A back and abs workout using an exercise ball (or Swiss ball). The unstable nature of the inflated ball engages and strengthens many more muscles than classic stomach crunches, helping to develop balance and posture.